Domino's Pizza — Treated rude and was over talked and not able to speak .

I was over charge, and tried to explain at the pick up window, Manager of Petal Ms, Domino's, shut the window so I went inside, I was asking why I was charge that amount, he cut me off and ask if I ask for the special, that was why I was charge the larger amount because I didn't ask for the special, of course I wanted the special, who what to pay 17.12 for 2 med pizza's when you would get 2 for 5.99 each, instead of trying to correct it, he wanted to go on and on about how it was my fault and did not refund the difference, because according to him I ordered the wrong way, I have been a customer for a long time' and have other pizza places that I can go, don't want to but will before I get treated like I don't matter .